Also, the 49ers' veteran began on-field work Monday with coaches for the first time since the opening of the offseason program. Veteran cornerback Nnamdi Asomugha wore No. 24.

In the offseason, several numbers are duplicated with offensive and defensive players. Running back Anthony Dixon also wears No. 24. One of the players will be re-assigned a new number if both players make the 53-man roster.

Each of the 11 players the 49ers players selected for their 2013 draft class were assigned their initial uniform numbers on Monday: